Beam recovery for partial control channel failure
Various embodiments disclosed herein provide for a beam recovery when there has been a partial control channel failure. Transient obstructions, and other interference effects can cause the failure of a beam pair link which can comprise a transmit beam and a receive beam associated with respective antennas on a transmitter and receiver. A group of control channels (downlink control channels) (configured as a control resource set “CORESET”) on a group of beam pair links can be associated with a group of uplink control resources (Physical Uplink Control Channel resources). When a subset of the CORESET group fails, the user equipment (UE) device can find another PUCCH that is associated with a working CORESET to send an indication to the network about the failure. When the network receives the indication, the network can switch the failed CORESET to a new beam pair link.
1. A user equipment device, comprising:
a processor; and
a memory that stores executable instructions that, when executed by the processor, facilitate performance of operations, comprising:
receiving a configuration where an uplink resource slot of a first beam pair link is associated with a group of downlink resource slots;
determining that the uplink resource slot is likely to fail based on a determination that downlink control information for a downlink resource slot of the first beam pair link satisfies a defined criterion associated with error correction, wherein the uplink resource slot facilitates transmitting uplink control information to a base station device, and wherein the downlink resource slot is one of the group of downlink resource slots;
in response to determining, based on the defined criterion associated with the error correction, that the uplink resource slot is likely to fail, switching the uplink resource slot to a second beam pair link and rescheduling the downlink resource slot for transmission via the second beam pair link; and
transmitting a notification to the base station device that the uplink resource slot has been transferred to the second beam pair link.
2. The user equipment device of claim 1 , wherein the downlink resource slot is a first downlink resource slot, and wherein the second beam pair link is associated with a second downlink resource slot of the group of downlink resource slots.
3. The user equipment device of claim 2 , wherein the second beam pair link comprises a signal strength above a predetermined signal strength for both an uplink transmission and a downlink transmission.
4. The user equipment device of claim 2 , wherein the first downlink resource slot is transmitted prior to the second downlink resource slot of the group of downlink resource slots.
5. The user equipment device of claim 1 , wherein the second beam pair link is selected based on an uplink beam management protocol.
6. The user equipment device of claim 5 , wherein the uplink beam management protocol is based on an indication of a signal strength received from the base station device of a reference signal transmitted by the user equipment device.
7. The user equipment device of claim 1 , wherein the notification comprises an index of the downlink resource slot.
8. The user equipment device of claim 1 , wherein the notification comprises a power indication of a reference signal associated with the downlink resource slot.
9. The user equipment device of claim 1 , wherein the operations further comprise:
linking uplink resource slots of a group of uplink resource slots to respective downlink resource slots of the group of downlink resource slots based on respective location parameters.
10. The user equipment device of claim 1 , wherein the second beam pair link is a beam pair link selected based on a beam management report generated prior to the switching the uplink resource slot to the second beam pair link.
11. A method, comprising:
determining, by a user equipment device comprising a processor, that downlink control data of a first beam pair link comprises a signal strength below a predetermined signal strength;
switching, by the user equipment device, uplink control data from the first beam pair link to a second beam pair link in response to the signal strength being below the predetermined signal strength;
rescheduling, by the user equipment device, the downlink control data of the first beam pair link for transmission via the second beam pair link; and
facilitating, by the user equipment device, transmitting a notification to a base station device that the uplink control data has been transferred to the second beam pair link.
12. The method of claim 11 , wherein the second beam pair link is a beam pair link that is determined to comprise the signal strength above the predetermined signal strength.
13. The method of claim 11 , wherein the second beam pair link is selected based on an uplink beam management protocol.
14. The method of claim 13 , wherein the uplink beam management protocol is based on signal strength data received from the base station device of a reference signal transmitted by the user equipment device.
15. The method of claim 11 , wherein the notification comprises an index of a downlink control resource set associated with the downlink control data, and wherein the notification comprises a power indication of a reference signal associated with the downlink control resource set.
16. The method of claim 11 , further comprising:
linking, by the user equipment device, an uplink resource slot for the uplink control data to a downlink resource slot for the downlink control data based on a quasi co-location parameter.
17. The method of claim 11 , wherein the second beam pair link is a beam pair link generated most recently that is selected based on a beam management report.
18. A non-transitory machine-readable storage medium, comprising executable instructions that, when executed by a processor of a device, facilitate performance of operations, comprising:
receiving a configuration where an uplink control resource slot is associated with a group of downlink control resource sets;
determining that downlink control data for a downlink control resource slot of the group of downlink control resource sets comprises a signal strength below a predetermined signal strength, wherein the group of downlink control resource sets are associated with respective beam pair links;
in response to the determining that the signal strength is below the predetermined signal strength, switching the uplink control resource slot associated with the downlink control resource slot from a first beam pair link to a second beam pair link, and rescheduling the downlink control data for transmission via the second beam pair link; and
transmitting a notification to a base station device that the uplink control resource slot has been transferred to the second beam pair link.
19. The non-transitory machine-readable storage medium of claim 18 , wherein the signal strength is a first signal strength, and wherein the second beam pair link is an earliest beam pair link that is determined to be available and is determined to have a second signal strength above the predetermined signal strength.
20. The non-transitory machine-readable storage medium of claim 18 , wherein the second beam pair link is selected based on an uplink beam management protocol.